TM-9-2540-207-14-P
HEATER, VEHICULAR COMPARTMENT, MODEL: A20
TECHNICAL MANUAL; OPERATOR, FIELD, AND SUSTAINMENT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2007
TM-9-2540-207-14-P - Page 186 of 288
TM 9-2540-207-14&P
6-22
6.5.28 E4 – REVERSE BURNER AIRFLOW (Design Iteration 3 Only)
BURNER FAN IS MEASURING REVERSE AIR THROUGH THE HEATER, OR IS OPERATING OUT
OF RANGE; REVERSE BURNER AIRFLOW – DURING RUN MODE W/ TEMP DELTAS OR –
DURING STARTUP OR
– DUE TO BURNER RPM’S OR – DUE TO BURNER DUTY
CHECK/POSSIBLE CAUSE
REF
.R
EPAIR
1
CHECK THAT DUCTING OF THE
COMBUSTION AIR SYSTEM TO THE
INLET AND THE EXHAUST DUCTING
ARE CORRECTLY ATTACHED TO
THE HEATER
NEGATIVE PRESSURE ON STARTUP
WILL GIVE THIS FAULT
2.2
RECONNECT COMBUSTION AIR DUCTING
CORRECTLY
RESTART HEATER
2
CHECK THAT COMBUSTION AIR AND
EXHAUST DUCTING IS FREE FROM
OBSTRUCTIONS
REMOVE OBSTRUCTIONS
RESTART HEATER
3
CHECK FOR CARBON
ACCUMULATION OR
OBSTRUCTIONS IN COMBUSTION
ASSEMBLY
5.3
REMOVE CARBON AND CLEAN COMBUSTION
ASSEMBLY
RESTART HEATER
CHECK CONDITION OF FLAME TUBE
AND BURNER CHAMBER
5.3.2
5.3.5
IF DISTORTED, REPLACE FLAME TUBE AND
BURNER CHAMBER
RESTART HEATER
4
CHECK FOR WARPED BURNER FAN
PLATE
5.5.4
REPLACE BURNER FAN PLATE
RESTART HEATER
5
DEFECTIVE BURNER FAN MOTOR
REPLACE BURNER FAN MOTOR
RESTART HEATER
6
DEFECTIVE LOGIC BOARD
REPLACE LOGIC BOARD
RESTART HEATER
7
DEFECTIVE HEAT EXCHANGER
REPLACE HEAT EXCHANGER
RESTART HEATER
6.5.29 E5 - INLET OVER PRESSURE (Design Iteration 1 & 2 Only)
AIR IS BEING FORCED THROUGH THE HEATER BY THE NBC SYSTEM AT STARTUP, OR
BURNER FAN OPERATING LIMITS ARE OUT OF RANGE
CHECK/POSSIBLE CAUSE
REF
.R
EPAIR
1
ENSURE ALL DUCTING TO HEATER
IS PROPERLY CONNECTED
2.3
2.7
RECONNECT DUCTING
RESTART HEATER
2
CHECK THAT NBC SYSTEM IS OFF
REF. APPROPRIATE VEHICLE TM
VEHICLE TM
TURN NBC SYSTEM OFF IF POSSIBLE
RESTART HEATER
RESTART NBC SYSTEM 5 MINUTES AFTER
HEATER ENTERS RUN MODE (07 OR 14)
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